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Stockholder's Equity (Details) |  |  |  |  |  | 12 Months Ended |  |  |  |
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Aug. 14, 2017 USD ($) $ / shares shares | May 27, 2015 $ / shares shares | May 21, 2015 shares | Apr. 15, 2015 USD ($) $ / shares shares | Jul. 15, 2014 USD ($) $ / shares shares | Jun. 30, 2017 Vote unit_holder $ / shares shares | Jun. 30, 2016 USD ($) $ / shares shares | Jun. 30, 2015 USD ($) shares | Feb. 01, 2016 USD ($) | Apr. 09, 2015 shares | Mar. 13, 2015 USD ($) $ / shares | Jun. 30, 2014 shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capital Stock, Shares authorized |  |  |  |  |  | 150,000,000 |  |  |  |  |  |
Common stock, par value (per share) | $ / shares |  |  |  |  |  | $ 0.01 |  |  |  |  |  |
Preferred stock, shares authorized |  |  |  |  |  | 25,000,000 | 25,000,000 |  |  |  |  |
Preferred stock, par value (per share) | $ / shares |  |  |  |  |  | $ 0.01 | $ 0.01 |  |  |  |  |
Number of Votes | Vote |  |  |  |  |  | 1 |  |  |  |  |  |
Number of LLC units outstanding (in shares) |  |  |  |  |  | 19,198,314.000 | 19,095,797.000 |  |  |  |  |
Number of unit holders | unit_holder |  |  |  |  |  | 4 |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 100.00% | 100.00% |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ / shares |  |  |  |  |  |  | $ 13.82 |  |  |  |  |
Stock Repurchased During Period, Value | $ |  |  |  |  |  |  | $ 3,984,000 | $ 71,523,000 |  |  |  |
Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  | 100,000,000 | 100,000,000 |  |  |  |  |
Common stock, par value (per share) | $ / shares |  |  |  |  |  | $ 0.01 | $ 0.01 |  |  |  |  |
Common stock, shares issued |  |  |  |  |  | 17,690,874 | 17,937,687 |  |  |  |  |
Issuance of common stock (shares) |  | 3,996,255 |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Retired |  |  | 19 |  |  |  | 1 |  |  |  |  |
Share price (in dollars per share) | $ / shares |  | $ 19.05 |  |  |  |  |  |  |  |  |  |
Common stock, shares, outstanding |  |  |  |  |  | 17,690,874 | 17,937,687 |  |  |  |  |
Stock repurchase program, authorized amount | $ |  |  |  |  |  |  |  |  | $ 15,000,000 |  |  |
Stock Repurchased During Period, Shares |  |  |  |  |  | 252,686 |  |  |  |  |  |
Conversion of previous classes of units into LLC units as part of the Recapitalization (in shares) |  | 2,967,267 |  |  |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued |  |  |  |  |  |  |  |  |  | 2,602,923 |  |
Stock repurchase program, authorized amount | $ |  |  |  |  |  |  |  |  |  |  | $ 70,000,000 |
stock repurchase per share | $ / shares |  |  |  | $ 21.00 |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares |  |  |  | 3,333,333 |  |  | 287,346 |  |  |  |  |
Repurchase of Class A Common Stock | $ |  |  |  | $ 70,000,000 |  |  |  |  |  |  |  |
Unsolicited Tender Offer Costs | $ |  |  |  | $ 1,523,000 |  |  |  |  |  |  |  |
Common shares, canceled (in shares) |  |  |  |  |  |  | 287,346 |  |  |  |  |
Class B Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  | 25,000,000 | 25,000,000 |  |  |  |  |
Common stock, par value (per share) | $ / shares |  |  |  |  |  | $ 0.01 | $ 0.01 |  |  |  |  |
Common stock, shares issued |  |  |  |  |  | 19 | 23 | 24 |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  |  |  |  | 0 |  |  |  |
Common stock, shares, outstanding |  |  |  |  |  | 19 | 23 |  |  |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period, Value | $ |  |  |  |  |  |  | $ 3,981,000 |  |  |  |  |
Common Stock [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) |  |  |  |  |  |  |  | 4,371,000 |  |  |  |
Treasury Stock, Shares, Retired |  |  |  |  |  |  |  | 3,333,000 |  |  |  |
Common stock, shares, outstanding |  |  |  |  |  | 17,938,000 | 17,690,000 | 17,859,000 |  |  |  | 11,064,000
Stock Repurchased During Period, Shares |  |  |  |  |  |  | 288,000 |  |  |  |  |
Conversion of previous classes of units into LLC units as part of the Recapitalization (in shares) |  |  |  |  |  | 145,000 | 14,000 | 5,583,000 |  |  |  |
Common Stock [Member] | Class B Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  | 25,000,000 |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  |  |  |  | 20 |  |  |  |
Common stock, shares, outstanding |  |  |  |  |  | 19 | 23.000 | 24 |  |  |  | 44
Common shares, canceled (in shares) |  |  |  |  |  | 4 | 1 |  |  |  |  |
Malibu Boat LLC [Member] | Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of LLC units outstanding (in shares) |  |  |  |  |  | 1,260,627 | 1,404,923 |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 6.60% | 7.40% |  |  |  |  |
Stock Sold by Selling Stockholders [Member] | Subsequent Event [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) | 300,000 |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
stock repurchase per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 21.00 |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
stock repurchase per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 23.50 |
Over-Allotment Option [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) |  | 521,250 |  |  |  |  |  |  |  |  |  |
Over-Allotment Option [Member] | Stock Sold by Company [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) |  |  |  |  | 538,252 |  |  |  |  |  |  |
Over-Allotment Option [Member] | Stock Sold by Selling Stockholders [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) |  |  |  |  | 181,748 |  |  |  |  |  |  |
Follow-On Offering [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ |  |  |  |  | $ 76,836,000 |  |  |  |  |  |  |
Underwriting discounts and commissions | $ |  |  |  |  | $ 5,106,000 |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares |  |  |  |  | $ 18.50 |  |  |  |  |  |  |
Follow-On Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) |  |  |  |  | 5,520,000 |  |  |  |  |  |  |
Follow-On Offering [Member] | Subsequent Event [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ | $ 55,317,000 |  |  |  |  |  |  |  |  |  |  |
Underwriting discounts and commissions | $ | $ 2,758,000 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (shares) | 2,300,000 |  |  |  |  |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares | $ 24.05 |  |  |  |  |  |  |  |  |  |  |
Follow-On Offering [Member] | Stock Sold by Company [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ |  |  |  |  | $ 102,120,000 |  |  |  |  |  |  |
Issuance of common stock (shares) |  |  |  |  | 4,371,893 |  |  |  |  |  |  |
Follow-On Offering [Member] | Stock Sold by Company [Member] | Subsequent Event [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ | $ 58,075,000 |  |  |  |  |  |  |  |  |  |  |
Follow-On Offering [Member] | Stock Sold by Selling Stockholders [Member] | Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ |  |  |  |  | $ 20,178,000 |  |  |  |  |  |  |
Issuance of common stock (shares) |  |  |  |  | 1,148,107 |  |  |  |  |  |  |

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